1. Property
One-way Pressure Sealant for Drilling Fluid is a product in the form of gray yellow powder,  When used in drilling, it can effectively block up leakage of every kind from the formation under the action of one-way pressure difference. 

Item	Index
Appearance	light yellow or yellow powder
Density, g/cm3	1.40-1.60
Residue on sieve(0.28mm standard sieve), %	≤10.0
Moisture,%	≤8.0
Residue on ignition,%	≤7.0
Water soluble	≤5%
Filtration loss, ml	≤35.0
PH	7---8
Change of density, g/cm3	±0.02
Note: Residue on ignition only for vegetable fibers:	36-45%

Storage and package
Stored in cool,dry and ventilated place.
25KG woven bag lined with pp bag.